What is corona treatment?

Corona treatment is a surface treatment technique. It modifies the surface of the base material to treat – such as plastic film, paper or metallic foil – by applying corona discharge.

Corona discharge is generated when high-frequency, high-voltage electricity from a corona generator is applied between the electrode and treating roller of the treating station.

A base material that passes through this corona discharge field is corona treated. This treatment generally improves wettability (wetting tension), and at the same time significantly improves the printing property, coating property, laminating property, etc.